1
|
Jara A, Undurraga EA, Flores JC, Zubizarreta JR, González C, Pizarro A, Ortuño-Borroto D, Acevedo J, Leo K, Paredes F, Bralic T, Vergara V, Leon F, Parot I, Leighton P, Suárez P, Rios JC, García-Escorza H, Araos R. Effectiveness of an inactivated SARS-CoV-2 vaccine in children and adolescents: a large-scale observational study. Lancet Reg Health Am 2023; 21:100487. [PMID: 37155483 PMCID: PMC10117174 DOI: 10.1016/j.lana.2023.100487] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 10/14/2022] [Accepted: 03/22/2023] [Indexed: 05/10/2023]
Abstract
Background Policymakers urgently need evidence to adequately balance the costs and benefits of mass vaccination against COVID-19 across all age groups, including children and adolescents. In this study, we aim to assess the effectiveness of CoronaVac's primary series among children and adolescents in Chile. Methods We used a large prospective national cohort of about two million children and adolescents 6-16 years to estimate the effectiveness of an inactivated SARS-CoV-2 vaccine (CoronaVac) in preventing laboratory-confirmed symptomatic SARS-CoV-2 infection (COVID-19), hospitalisation, and admission to an intensive care unit (ICU) associated with COVID-19. We compared the risk of individuals treated with a complete primary immunization schedule (two doses, 28 days apart) with the risk of unvaccinated individuals during the follow-up period. The study was conducted in Chile from June 27, 2021, to January 12, 2022, when the SARS-CoV-2 Delta variant was predominant but other variants of concern were co-circulating, including Omicron. We used inverse probability-weighted survival regression models to estimate hazard ratios of complete immunization over the unvaccinated status, accounting for time-varying vaccination exposure and adjusting for relevant demographic, socioeconomic, and clinical confounders. Findings The estimated adjusted vaccine effectiveness for the inactivated SARS-CoV-2 vaccine in children aged 6-16 years was 74.5% (95% CI, 73.8-75.2), 91.0% (95% CI, 87.8-93.4), 93.8% (95% CI, 87.8-93.4) for the prevention of COVID-19, hospitalisation, and ICU admission, respectively. For the subgroup of children 6-11 years, the vaccine effectiveness was 75.8% (95% CI, 74.7-76.8) for the prevention of COVID-19 and 77.9% (95% CI, 61.5-87.3) for the prevention of hospitalisation. Interpretation Our results suggest that a complete primary immunization schedule with the inactivated SARS-CoV-2 vaccine provides effective protection against severe COVID-19 disease for children 6-16 years. Funding Agencia Nacional de Investigación y Desarrollo (ANID) Millennium Science Initiative Program and Fondo de Financiamiento de Centros de Investigación en Áreas Prioritarias (FONDAP).
Collapse
Affiliation(s)
- Alejandro Jara
- Ministry of Health, Santiago, Chile
- Facultad de Matemáticas, Pontificia Universidad Católica de Chile, Santiago, Chile
- Center for the Discovery of Structures in Complex Data (MiDaS), Santiago, Chile
| | - Eduardo A Undurraga
- Escuela de Gobierno, Pontificia Universidad Católica de Chile, Santiago, RM, Chile
- Initiative for Collaborative Research in Bacterial Resistance (MICROB-R), Santiago, Chile
- Research Center for Integrated Disaster Risk Management (CIGIDEN), Santiago, Chile
- CIFAR Azrieli Global Scholars Program, CIFAR, Toronto, Canada
| | - Juan Carlos Flores
- Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - José R Zubizarreta
- Department of Health Care Policy, Harvard Medical School, Boston, MA, USA
- Department of Biostatistics, Harvard T.H. School of Public Health, Boston, MA, USA
- Department of Statistics, Harvard T.H. School of Public Health, Boston, MA, USA
| | | | - Alejandra Pizarro
- Ministry of Health, Santiago, Chile
- Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | | | | | | | | | | | | | | | | | | | - Juan Carlos Rios
- Ministry of Health, Santiago, Chile
- Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | - Rafael Araos
- Ministry of Health, Santiago, Chile
- Initiative for Collaborative Research in Bacterial Resistance (MICROB-R), Santiago, Chile
- Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Universidad del Desarrollo, Santiago, Chile
- Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile
| |
Collapse
|
2
|
Jara A, Undurraga EA, Zubizarreta JR, González C, Acevedo J, Pizarro A, Vergara V, Soto-Marchant M, Gilabert R, Flores JC, Suárez P, Leighton P, Eguiguren P, Ríos JC, Fernandez J, García-Escorza H, Araos R. Effectiveness of CoronaVac in children 3 to 5 years during the SARS-CoV-2 Omicron outbreak in Chile. Nat Med 2022; 28:1377-1380. [PMID: 35605637 PMCID: PMC9307483 DOI: 10.1038/s41591-022-01874-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 05/18/2022] [Indexed: 11/18/2022]
Abstract
The outbreak of the B.1.1.529 lineage of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) (Omicron) has caused an unprecedented number of Coronavirus Disease 2019 (COVID-19) cases, including pediatric hospital admissions. Policymakers urgently need evidence of vaccine effectiveness in children to balance the costs and benefits of vaccination campaigns, but, to date, the evidence is sparse. Leveraging a population-based cohort in Chile of 490,694 children aged 3–5 years, we estimated the effectiveness of administering a two-dose schedule, 28 days apart, of Sinovac’s inactivated SARS-CoV-2 vaccine (CoronaVac). We used inverse probability-weighted survival regression models to estimate hazard ratios of symptomatic COVID-19, hospitalization and admission to an intensive care unit (ICU) for children with complete immunization over non-vaccination, accounting for time-varying vaccination exposure and relevant confounders. The study was conducted between 6 December 2021 and 26 February 2022, during the Omicron outbreak in Chile. The estimated vaccine effectiveness was 38.2% (95% confidence interval (CI), 36.5–39.9) against symptomatic COVID-19, 64.6% (95% CI, 49.6–75.2) against hospitalization and 69.0% (95% CI, 18.6–88.2) against ICU admission. The effectiveness against symptomatic COVID-19 was modest; however, protection against severe disease was high. These results support vaccination of children aged 3–5 years to prevent severe illness and associated complications and highlight the importance of maintaining layered protections against SARS-CoV-2 infection. CoronaVac protects young children from severe COVID-19 during a SARS-CoV-2 Omicron surge, supporting the effectiveness and importance of vaccinating this pediatric population.
Collapse
Affiliation(s)
- Alejandro Jara
- Ministry of Health, Santiago, Chile.,Facultad de Matemáticas, Pontificia Universidad Católica de Chile, Santiago, Chile.,Center for the Discovery of Structures in Complex Data (MiDaS), Santiago, Chile
| | - Eduardo A Undurraga
- Escuela de Gobierno, Pontificia Universidad Católica de Chile, Santiago, RM, Chile.,Initiative for Collaborative Research in Bacterial Resistance (MICROB-R), Santiago, Chile.,Research Center for Integrated Disaster Risk Management (CIGIDEN), Santiago, Chile.,CIFAR Azrieli Global Scholars program, CIFAR, Toronto, Canada
| | - José R Zubizarreta
- Department of Health Care Policy, Harvard Medical School, Boston, Massachusetts, USA.,Department of Biostatistics, Harvard T.H. School of Public Health, Boston, Massachusetts, USA.,Department of Statistics, Harvard T.H. School of Public Health, Boston, Massachusetts, USA
| | | | | | - Alejandra Pizarro
- Ministry of Health, Santiago, Chile.,Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | | | | | - Juan Carlos Flores
- Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | | | | | - Juan Carlos Ríos
- Ministry of Health, Santiago, Chile.,Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | | | - Rafael Araos
- Ministry of Health, Santiago, Chile. .,Initiative for Collaborative Research in Bacterial Resistance (MICROB-R), Santiago, Chile. .,Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Universidad del Desarrollo, Santiago, Chile. .,Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile.
| |
Collapse
|
3
|
Méndez R, Figuerola A, Chicot M, Barrios A, Pascual N, Ramasco F, Rodríguez D, García I, von Wernitz A, Zurita N, Semiglia A, Jiménez D, Navarro S, Rubio MJ, Vinuesa M, Del Campo L, Bautista A, Pizarro A. Sepsis Code: dodging mortality in a tertiary hospital. Rev Esp Quimioter 2022; 35:43-49. [PMID: 34812031 PMCID: PMC8790636 DOI: 10.37201/req/105.2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Introducción En el hospital de La Princesa comienza el “Código Sepsis” (CSP) en el año 2015, como un grupo multidisciplinar que dota al personal sanitario de herramientas clínicas, analíticas y organizativas, con el objetivo de la detección y el tratamiento precoz del paciente con sepsis. El objetivo de este estudio es evaluar el impacto de la implantación de CSP en la mortalidad y determinar las variables asociadas con un aumento de la misma. Material y métodos Se realizó un estudio analítico retrospectivo de los pacientes con activación de la alerta CSP de 2015 a 2018. Se recogieron variables clínico-epidemiológicas, parámetros analíticos y factores de gravedad como el ingreso en Unidades de Cuidados Críticos (UCC) y la necesidad de aminas. La significación estadística se estableció en una p < 0,05. Resultados Se incluyeron 1.121 pacientes. La estancia media fue de 16 días y un 32% requirieron ingreso en UCC. La mortalidad mostró una tendencia lineal descendente estadísticamente significativa del 24% en 2015 hasta el 15% en 2018. Las variables predictivas de mortalidad con asociación estadísticamente significativa fueron el lactato > 2 mmol/L, la creatinina > 1,6 mg/dL y la necesidad de aminas. Conclusiones La implementación de Código Sepsis disminuye la mortalidad de los pacientes con sepsis y shock séptico. La presencia de una cifra de lactato > 2 mmol/L, los niveles de creatinina > 1,6 mg/dL y/o la necesidad de administrar aminas en las primeras 24 horas, se asocian con un aumento de la mortalidad en el paciente con sepsis.
Collapse
Affiliation(s)
- R Méndez
- Rosa Méndez Hernández. Servicio de Anestesia y Reanimación. Hospital Universitario de La Princesa. Calle Diego de León 62. 28006. Madrid, Spain.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
4
|
Jara A, Undurraga EA, González C, Paredes F, Fontecilla T, Jara G, Pizarro A, Acevedo J, Leo K, Leon F, Sans C, Leighton P, Suárez P, García-Escorza H, Araos R. Effectiveness of an Inactivated SARS-CoV-2 Vaccine in Chile. N Engl J Med 2021; 385:875-884. [PMID: 34233097 PMCID: PMC8279092 DOI: 10.1056/nejmoa2107715] [Citation(s) in RCA: 523] [Impact Index Per Article: 174.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Mass vaccination campaigns to prevent coronavirus disease 2019 (Covid-19) are occurring in many countries; estimates of vaccine effectiveness are urgently needed to support decision making. A countrywide mass vaccination campaign with the use of an inactivated severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccine (CoronaVac) was conducted in Chile starting on February 2, 2021. METHODS We used a prospective national cohort, including participants 16 years of age or older who were affiliated with the public national health care system, to assess the effectiveness of the inactivated SARS-CoV-2 vaccine with regard to preventing Covid-19 and related hospitalization, admission to the intensive care unit (ICU), and death. We estimated hazard ratios using the extension of the Cox proportional-hazards model, accounting for time-varying vaccination status. We estimated the change in the hazard ratio associated with partial immunization (≥14 days after receipt of the first dose and before receipt of the second dose) and full immunization (≥14 days after receipt of the second dose). Vaccine effectiveness was estimated with adjustment for individual demographic and clinical characteristics. RESULTS The study was conducted from February 2 through May 1, 2021, and the cohort included approximately 10.2 million persons. Among persons who were fully immunized, the adjusted vaccine effectiveness was 65.9% (95% confidence interval [CI], 65.2 to 66.6) for the prevention of Covid-19 and 87.5% (95% CI, 86.7 to 88.2) for the prevention of hospitalization, 90.3% (95% CI, 89.1 to 91.4) for the prevention of ICU admission, and 86.3% (95% CI, 84.5 to 87.9) for the prevention of Covid-19-related death. CONCLUSIONS Our results suggest that the inactivated SARS-CoV-2 vaccine effectively prevented Covid-19, including severe disease and death, a finding that is consistent with results of phase 2 trials of the vaccine. (Funded by Agencia Nacional de Investigación y Desarrollo and others.).
Collapse
Affiliation(s)
- Alejandro Jara
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Eduardo A Undurraga
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Cecilia González
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Fabio Paredes
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Tomás Fontecilla
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Gonzalo Jara
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Alejandra Pizarro
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Johanna Acevedo
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Katherinne Leo
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Francisco Leon
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Carlos Sans
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Paulina Leighton
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Pamela Suárez
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Heriberto García-Escorza
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| | - Rafael Araos
- From the Ministry of Health (A.J., C.G., F.P., T.F., G.J., A.P., J.A., K.L., F.L., C.S., P.L., P.S., H.G.-E., R.A.), Facultad de Matemáticas (A.J.) and Escuela de Gobierno (E.A.U.), Pontificia Universidad Católica de Chile, Millennium Nucleus Center for the Discovery of Structures in Complex Data (A.J.), Millennium Initiative for Collaborative Research in Bacterial Resistance (E.A.U., R.A.), the Research Center for Integrated Disaster Risk Management (E.A.U.), Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo (R.A.), and the Advanced Center for Chronic Diseases (R.A.) - all in Santiago, Chile; and the CIFAR Azrieli Global Scholars Program, CIFAR, Toronto (E.A.U.)
| |
Collapse
|
5
|
Dabanch J, Bastías M, Endeiza ML, Díaz E, Inostroza J, Cerda J, Santillana S, Rodríguez J, González C, Rodríguez M, Pizarro A. [Consolidated recommendations of the Advisory Committee on Vaccines and Immunization Strategies- on prioritizing COVID-19 vaccination]. Rev Chilena Infectol 2021; 38:185-188. [PMID: 34184708 DOI: 10.4067/s0716-10182021000200185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Indexed: 11/17/2022] Open
Abstract
COVID-19 is a global public health issue due to its epidemic nature that, to date, lacks pharmacological treatment. However, some COVID-19 vaccines have been authorized for emergency use, although the duration of their protection, their ability to interrupt viral transmission, and their efficacy against emerging variants of SARS-CoV-2 are being studied. Chile's SARS-CoV-2 vaccination campaign required design and planning, like any other campaign. This process included the prioritization of risk groups for vaccination given the limited supply of COVID-19 vaccines globally. Throughout 2020, CAVEI issued recommendations on the prioritization of population groups to be vaccinated against SARS-CoV-2 in response to different needs and in accordance with available evidence. These recommendations are consolidated in Table 1 in this report. In summary, it was recommended that healthcare workers, people in long-term residences and essential State personnel be vaccinated in phase 1. In phase 2, persons over 65 years of age and people with comorbidities. In phase 3, essential tasks workers and, lastly, the general population.
Collapse
Affiliation(s)
- Jeannette Dabanch
- Comité Asesor de Vacunas y Estrategias de Inmunización, Ministerio de Salud de Chile, Chile
| | - Magdalena Bastías
- Comité Asesor de Vacunas y Estrategias de Inmunización, Ministerio de Salud de Chile, Chile
| | - María L Endeiza
- Comité Asesor de Vacunas y Estrategias de Inmunización, Ministerio de Salud de Chile, Chile
| | - Eduardo Díaz
- Comité Asesor de Vacunas y Estrategias de Inmunización, Ministerio de Salud de Chile, Chile
| | - Jaime Inostroza
- Comité Asesor de Vacunas y Estrategias de Inmunización, Ministerio de Salud de Chile, Chile
| | - Jaime Cerda
- Comité Asesor de Vacunas y Estrategias de Inmunización, Ministerio de Salud de Chile, Chile
| | - Solange Santillana
- Comité Asesor de Vacunas y Estrategias de Inmunización, Ministerio de Salud de Chile, Chile
| | - Jaime Rodríguez
- Comité Asesor de Vacunas y Estrategias de Inmunización, Ministerio de Salud de Chile, Chile
| | - Cecilia González
- Comité Asesor de Vacunas y Estrategias de Inmunización, Ministerio de Salud de Chile, Chile
| | - María Rodríguez
- Comité Asesor de Vacunas y Estrategias de Inmunización, Ministerio de Salud de Chile, Chile
| | - Alejandra Pizarro
- Comité Asesor de Vacunas y Estrategias de Inmunización, Ministerio de Salud de Chile, Chile
| |
Collapse
|
6
|
López-Hinojosa M, de María N, Guevara MA, Vélez MD, Cabezas JA, Díaz LM, Mancha JA, Pizarro A, Manjarrez LF, Collada C, Díaz-Sala C, Cervera Goy MT. Rootstock effects on scion gene expression in maritime pine. Sci Rep 2021; 11:11582. [PMID: 34078936 PMCID: PMC8173007 DOI: 10.1038/s41598-021-90672-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 05/04/2021] [Indexed: 12/04/2022] Open
Abstract
Pines are the dominant conifers in Mediterranean forests. As long-lived sessile organisms that seasonally have to cope with drought periods, they have developed a variety of adaptive responses. However, during last decades, highly intense and long-lasting drought events could have contributed to decay and mortality of the most susceptible trees. Among conifer species, Pinus pinaster Ait. shows remarkable ability to adapt to different environments. Previous molecular analysis of a full-sib family designed to study drought response led us to find active transcriptional activity of stress-responding genes even without water deprivation in tolerant genotypes. To improve our knowledge about communication between above- and below-ground organs of maritime pine, we have analyzed four graft-type constructions using two siblings as rootstocks and their progenitors, Gal 1056 and Oria 6, as scions. Transcriptomic profiles of needles from both scions were modified by the rootstock they were grafted on. However, the most significant differential gene expression was observed in drought-sensitive Gal 1056, while in drought-tolerant Oria 6, differential gene expression was very much lower. Furthermore, both scions grafted onto drought-tolerant rootstocks showed activation of genes involved in tolerance to abiotic stress, and is most remarkable in Oria 6 grafts where higher accumulation of transcripts involved in phytohormone action, transcriptional regulation, photosynthesis and signaling has been found. Additionally, processes, such as those related to secondary metabolism, were mainly associated with the scion genotype. This study provides pioneering information about rootstock effects on scion gene expression in conifers.
Collapse
Affiliation(s)
- M López-Hinojosa
- Departamento de Ecología y Genética Forestal, Centro de Investigación Forestal (CIFOR), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain.,Unidad Mixta de Genómica y Ecofisiología Forestal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)/Universidad Politécnica de Madrid (INIA/UPM), Madrid, Spain
| | - N de María
- Departamento de Ecología y Genética Forestal, Centro de Investigación Forestal (CIFOR), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain.,Unidad Mixta de Genómica y Ecofisiología Forestal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)/Universidad Politécnica de Madrid (INIA/UPM), Madrid, Spain
| | - M A Guevara
- Departamento de Ecología y Genética Forestal, Centro de Investigación Forestal (CIFOR), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain.,Unidad Mixta de Genómica y Ecofisiología Forestal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)/Universidad Politécnica de Madrid (INIA/UPM), Madrid, Spain
| | - M D Vélez
- Departamento de Ecología y Genética Forestal, Centro de Investigación Forestal (CIFOR), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain.,Unidad Mixta de Genómica y Ecofisiología Forestal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)/Universidad Politécnica de Madrid (INIA/UPM), Madrid, Spain
| | - J A Cabezas
- Departamento de Ecología y Genética Forestal, Centro de Investigación Forestal (CIFOR), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain.,Unidad Mixta de Genómica y Ecofisiología Forestal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)/Universidad Politécnica de Madrid (INIA/UPM), Madrid, Spain
| | - L M Díaz
- Departamento de Ecología y Genética Forestal, Centro de Investigación Forestal (CIFOR), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain.,Unidad Mixta de Genómica y Ecofisiología Forestal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)/Universidad Politécnica de Madrid (INIA/UPM), Madrid, Spain
| | - J A Mancha
- Departamento de Ecología y Genética Forestal, Centro de Investigación Forestal (CIFOR), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain.,Unidad Mixta de Genómica y Ecofisiología Forestal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)/Universidad Politécnica de Madrid (INIA/UPM), Madrid, Spain
| | - A Pizarro
- Departamento de Ciencias de la Vida, Universidad de Alcalá (UAH), Alcalá de Henares, Spain
| | - L F Manjarrez
- Departamento de Ecología y Genética Forestal, Centro de Investigación Forestal (CIFOR), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain.,Unidad Mixta de Genómica y Ecofisiología Forestal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)/Universidad Politécnica de Madrid (INIA/UPM), Madrid, Spain
| | - C Collada
- Unidad Mixta de Genómica y Ecofisiología Forestal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)/Universidad Politécnica de Madrid (INIA/UPM), Madrid, Spain.,Departamento de Sistemas y Recursos Naturales, E.T.S.I. Montes, Forestal y Medio Natural, Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - C Díaz-Sala
- Departamento de Ciencias de la Vida, Universidad de Alcalá (UAH), Alcalá de Henares, Spain
| | - M T Cervera Goy
- Departamento de Ecología y Genética Forestal, Centro de Investigación Forestal (CIFOR), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain. .,Unidad Mixta de Genómica y Ecofisiología Forestal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)/Universidad Politécnica de Madrid (INIA/UPM), Madrid, Spain.
| |
Collapse
|
7
|
Balcells ME, Rojas L, Le Corre N, Martínez-Valdebenito C, Ceballos ME, Ferrés M, Chang M, Vizcaya C, Mondaca S, Huete Á, Castro R, Sarmiento M, Villarroel L, Pizarro A, Ross P, Santander J, Lara B, Ferrada M, Vargas-Salas S, Beltrán-Pavez C, Soto-Rifo R, Valiente-Echeverría F, Caglevic C, Mahave M, Selman C, Gazitúa R, Briones JL, Villarroel-Espindola F, Balmaceda C, Espinoza MA, Pereira J, Nervi B. Early versus deferred anti-SARS-CoV-2 convalescent plasma in patients admitted for COVID-19: A randomized phase II clinical trial. PLoS Med 2021; 18:e1003415. [PMID: 33657114 PMCID: PMC7929568 DOI: 10.1371/journal.pmed.1003415] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 01/12/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Convalescent plasma (CP), despite limited evidence on its efficacy, is being widely used as a compassionate therapy for hospitalized patients with COVID-19. We aimed to evaluate the efficacy and safety of early CP therapy in COVID-19 progression. METHODS AND FINDINGS The study was an open-label, single-center randomized clinical trial performed in an academic medical center in Santiago, Chile, from May 10, 2020, to July 18, 2020, with final follow-up until August 17, 2020. The trial included patients hospitalized within the first 7 days of COVID-19 symptom onset, presenting risk factors for illness progression and not on mechanical ventilation. The intervention consisted of immediate CP (early plasma group) versus no CP unless developing prespecified criteria of deterioration (deferred plasma group). Additional standard treatment was allowed in both arms. The primary outcome was a composite of mechanical ventilation, hospitalization for >14 days, or death. The key secondary outcomes included time to respiratory failure, days of mechanical ventilation, hospital length of stay, mortality at 30 days, and SARS-CoV-2 real-time PCR clearance rate. Of 58 randomized patients (mean age, 65.8 years; 50% male), 57 (98.3%) completed the trial. A total of 13 (43.3%) participants from the deferred group received plasma based on clinical aggravation. We failed to find benefit in the primary outcome (32.1% versus 33.3%, odds ratio [OR] 0.95, 95% CI 0.32-2.84, p > 0.999) in the early versus deferred CP group. The in-hospital mortality rate was 17.9% versus 6.7% (OR 3.04, 95% CI 0.54-17.17 p = 0.246), mechanical ventilation 17.9% versus 6.7% (OR 3.04, 95% CI 0.54-17.17, p = 0.246), and prolonged hospitalization 21.4% versus 30.0% (OR 0.64, 95% CI, 0.19-2.10, p = 0.554) in the early versus deferred CP group, respectively. The viral clearance rate on day 3 (26% versus 8%, p = 0.204) and day 7 (38% versus 19%, p = 0.374) did not differ between groups. Two patients experienced serious adverse events within 6 hours after plasma transfusion. The main limitation of this study is the lack of statistical power to detect a smaller but clinically relevant therapeutic effect of CP, as well as not having confirmed neutralizing antibodies in donor before plasma infusion. CONCLUSIONS In the present study, we failed to find evidence of benefit in mortality, length of hospitalization, or mechanical ventilation requirement by immediate addition of CP therapy in the early stages of COVID-19 compared to its use only in case of patient deterioration. TRIAL REGISTRATION NCT04375098.
Collapse
Affiliation(s)
- María Elvira Balcells
- Department of Infectious Diseases, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Luis Rojas
- Department of Internal Medicine, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
- Program of Pharmacology and Toxicology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Nicole Le Corre
- Department of Pediatric Infectious Diseases and Immunology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
- Diagnostic Virology Laboratory, Red de Salud UC CHRISTUS, Santiago, Chile
| | - Constanza Martínez-Valdebenito
- Department of Pediatric Infectious Diseases and Immunology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
- Diagnostic Virology Laboratory, Red de Salud UC CHRISTUS, Santiago, Chile
| | - María Elena Ceballos
- Department of Infectious Diseases, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Marcela Ferrés
- Department of Pediatric Infectious Diseases and Immunology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
- Diagnostic Virology Laboratory, Red de Salud UC CHRISTUS, Santiago, Chile
| | - Mayling Chang
- Department of Hematology and Oncology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Cecilia Vizcaya
- Department of Pediatric Infectious Diseases and Immunology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Sebastián Mondaca
- Department of Hematology and Oncology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Álvaro Huete
- Department of Radiology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Ricardo Castro
- Department of Intensive Care Medicine, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Mauricio Sarmiento
- Department of Hematology and Oncology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Luis Villarroel
- Department of Public Health, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Alejandra Pizarro
- Department of Infectious Diseases, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Patricio Ross
- Department of Internal Medicine, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Jaime Santander
- Department of Psychiatry, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Bárbara Lara
- Emergency Medicine Section, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Marcela Ferrada
- Clinical Research Center, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Sergio Vargas-Salas
- Department of Hematology and Oncology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Carolina Beltrán-Pavez
- Laboratory of Molecular and Cellular Virology, Virology Program, Institute of Biomedical Sciences, Faculty of Medicine, Universidad de Chile, Santiago, Chile
- HIV/AIDS Work Group, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Ricardo Soto-Rifo
- Laboratory of Molecular and Cellular Virology, Virology Program, Institute of Biomedical Sciences, Faculty of Medicine, Universidad de Chile, Santiago, Chile
- HIV/AIDS Work Group, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Fernando Valiente-Echeverría
- Laboratory of Molecular and Cellular Virology, Virology Program, Institute of Biomedical Sciences, Faculty of Medicine, Universidad de Chile, Santiago, Chile
- HIV/AIDS Work Group, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | | | - Mauricio Mahave
- Instituto Oncológico Fundación Arturo López Pérez, Santiago, Chile
| | - Carolina Selman
- Instituto Oncológico Fundación Arturo López Pérez, Santiago, Chile
| | - Raimundo Gazitúa
- Instituto Oncológico Fundación Arturo López Pérez, Santiago, Chile
| | | | - Franz Villarroel-Espindola
- Instituto Oncológico Fundación Arturo López Pérez, Santiago, Chile
- Translational Medicine Research Laboratory, Fundación Arturo López Pérez, Santiago, Chile
| | - Carlos Balmaceda
- Health Technology Assessment Unit, Clinical Research Center, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Manuel A. Espinoza
- Department of Public Health, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Jaime Pereira
- Department of Hematology and Oncology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Bruno Nervi
- Department of Hematology and Oncology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| |
Collapse
|
8
|
Balcells ME, Carvajal C, Fernández P, Ruiz-Tagle C, Pizarro A, García P, Peña C, Cuevas G, Naves R. Estrategia de pesquisa sistemática y seguimiento prolongado revela alto número de nuevas infecciones tuberculosas en contactos adultos en la Región Metropolitana, Chile. Rev Med Chil 2020; 148:151-159. [DOI: 10.4067/s0034-98872020000200151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 01/17/2020] [Indexed: 11/17/2022]
|
9
|
Pizarro A, Arranz D, Villeta M, Valencia J. Absence of thick, nodular melanomas during long‐term surveillance with total body photography and digital dermatoscopy. J Eur Acad Dermatol Venereol 2019; 33:e341-e342. [DOI: 10.1111/jdv.15631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A. Pizarro
- Melanoma Unit Clínica Dermatológica Internacional Marqués de Villamagna 8 Madrid 28001 Spain
- Instituto Madrileño de Oncología Emilio vargas 16 Madrid 28043 Spain
- Dermatology Service Hospital Universitario La Paz Paseo de la Castellana 261 Madrid 28046 Spain
| | - D. Arranz
- Dermatology Service Hospital Infanta Sofía Paseo de Europa 34, San Sebastián de los Reyes Madrid 28702 Spain
| | - M. Villeta
- Departamento de Estadística y Ciencia de los Datos Facultad de Estudios Estadísiticos Universidad Complutense Avenida Puerta de Hierro 1 Madrid 28040 Spain
| | - J.L. Valencia
- Departamento de Estadística y Ciencia de los Datos Facultad de Estudios Estadísiticos Universidad Complutense Avenida Puerta de Hierro 1 Madrid 28040 Spain
| |
Collapse
|
10
|
Dal Sasso SF, Pizarro A, Samela C, Mita L, Manfreda S. Exploring the optimal experimental setup for surface flow velocity measurements using PTV. Environ Monit Assess 2018; 190:460. [PMID: 29998453 DOI: 10.1007/s10661-018-6848-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Accepted: 07/02/2018] [Indexed: 06/08/2023]
Abstract
Advances in flow monitoring are crucial to increase our knowledge on basin hydrology and to understand the interactions between flow dynamics and infrastructures. In this context, image processing offers great potential for hydraulic monitoring, allowing acquisition of a wide range of measurements with high spatial resolution at relatively low costs. In particular, the particle tracking velocimetry (PTV) algorithm can be used to describe the dynamics of surface flow velocity in both space and time using fixed cameras or unmanned aerial systems (UASs). In this study, analyses allowed exploration of the optimal particle seeding density and frame rate in different configurations. Numerical results provided useful indications for two field experiments that have been carried out with a low-cost quadrocopter equipped with an optical camera to record RGB videos of floating tracers manually distributed over the water surface. Field measurements have been carried out using different natural tracers under diverse hydraulic and morphological conditions; PTV's processed velocities have been subsequently benchmarked with current meter measurements. The numerical results allowed rapid identification of the experimental configuration (e.g., required particle seeding density, image resolution, particle size, and frame frequency) producing flow velocity fields with high resolution in time and space with good agreement with the benchmark velocity values measured with conventional instruments.
Collapse
Affiliation(s)
- S F Dal Sasso
- Department of European and Mediterranean Cultures, University of Basilicata, via Lazazzera SN, 75100, Matera, Italy.
| | - A Pizarro
- Department of European and Mediterranean Cultures, University of Basilicata, via Lazazzera SN, 75100, Matera, Italy
| | - C Samela
- Department of European and Mediterranean Cultures, University of Basilicata, via Lazazzera SN, 75100, Matera, Italy
| | - L Mita
- Department of European and Mediterranean Cultures, University of Basilicata, via Lazazzera SN, 75100, Matera, Italy
| | - S Manfreda
- Department of European and Mediterranean Cultures, University of Basilicata, via Lazazzera SN, 75100, Matera, Italy
| |
Collapse
|
11
|
Llambrich A, Zaballos P, Taberner R, Terrasa F, Bañuls J, Pizarro A, Malvehy J, Puig S. Dermoscopy of inverted follicular keratosis: study of 12 cases. Clin Exp Dermatol 2016; 41:468-73. [PMID: 27018237 DOI: 10.1111/ced.12832] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Inverted follicular keratosis (IFK) is an uncommon benign tumour of the follicular infundibulum, which is often misdiagnosed clinically as other keratinizing tumours, and commonly diagnosed correctly by histopathology. There are few reports about the dermoscopic findings of this lesion. AIM To evaluate the dermoscopic features of IFK. METHODS The dermoscopic structures and patterns in digital dermoscopic images of 12 histopathologically confirmed cases of IFK collected from 5 hospitals in Spain were evaluated. RESULTS A keratoacanthoma (KA)-like pattern composed of central keratin surrounded by hairpin vessels in a radial arrangement was the most common pattern in IFK (58.3%). The second most common pattern was composed of a yellowish-white amorphous central area surrounded by vascular structures in a radial arrangement (33.3%). The remaining case showed a pattern composed of a yellowish-white amorphous central area with milky red globules. Vascular structures were present in all cases, with a monomorphic pattern in seven cases and a polymorphic pattern in five, mainly with radial arrangement. Arborizing vessels, linear irregular vessels, corkscrew vessels and milky red globules were present in some cases. CONCLUSIONS We describe the two main patterns of IFK. Lesions with a KA-like pattern are clinically and dermoscopically undistinguishable from KA and squamous cell carcinoma. Cases with a polymorphic vascular pattern could be confused with malignant tumours, including basal cell carcinoma and amelanotic melanoma.
Collapse
Affiliation(s)
- A Llambrich
- Dermatology, Hospital Son Llatzer, Palma Mallorca, Spain
| | - P Zaballos
- Pathology Departments, Hospital Son Llatzer, Palma Mallorca, Spain
| | - R Taberner
- Dermatology, Hospital Son Llatzer, Palma Mallorca, Spain
| | - F Terrasa
- Dermatology Department, Hospital Sant Pau i Santa Tecla, Tarragona, Spain
| | - J Bañuls
- Dermatology Department, Hospital Universitario de Alicante, Alicante, Spain
| | - A Pizarro
- Dermatology Department, Clínica Dermatológica Internacional and Clínica Ruber, Madrid, Spain
| | - J Malvehy
- Department of Dermatology, Melanoma Unit, Hospital Clinic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Universitat de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Barcelona, Spain
| | - S Puig
- Department of Dermatology, Melanoma Unit, Hospital Clinic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Universitat de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Barcelona, Spain
| |
Collapse
|
12
|
Pizarro A, Ribeiro J, Mota J, Silva P, Marques E, Santos M. Accelerometer use in children: Differences in weekend compliance. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
13
|
Santos M, Pizarro A, Ribeiro J, Mota J, Cazuza J. Social support and adolescents’ physical activity participation: The mediating effect of self-efficacy. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.678] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
14
|
Gamallo C, Palacios J, Benito N, Limeres M, Pizarro A, Suarez A, Pastrana F, Cano A, Calero F. Expression of E-cadherin in 230 infiltrating ductal breast carcinoma. Int J Oncol 2012; 9:1207-12. [PMID: 21541629 DOI: 10.3892/ijo.9.6.1207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The immunohistochemical expression of E-cadherin (E-CD) was correlated to differentiation grade, tumor size, axillary lymph node metastasis, hormone receptor status and disease outcome in 230 infiltrating ductal breast carcinomas. E-CD expression was reduced in 116 tumors (50.4%). Reduced E-CD expression was more frequently found in high histological grade and progesterone receptor negative tumors. In contrast, preserved E-CD expression was more frequently observed in tumors with axillary lymph node metastasis, particularly in the group of patients with 1 to 3 positive lymph nodes. A weak association between reduced E-CD expression and shortened overall survival was found in univariate survival analysis, that was lost when the patients were adjusted for other pathological factors in multivariate analysis. These data indicate that E-CD may be considered a differentiation marker in ductal carcinomas of non special type. However, the relationship between E-CD expression and lymph node metastasis and disease outcome remains to be established.
Collapse
Affiliation(s)
- C Gamallo
- HOSP LA PAZ,DEPT OBSTET & GINECOL,E-28046 MADRID,SPAIN. UNIV AUTONOMA MADRID,FAC MED,CSIC,E-28029 MADRID,SPAIN. UNIV AUTONOMA MADRID,FAC MED,DEPT BIOQUIM,E-28029 MADRID,SPAIN
| | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Ibarrola-Villava M, Martin-Gonzalez M, Lazaro P, Pizarro A, Lluch A, Ribas G. Role of glutathione S-transferases in melanoma susceptibility: association with GSTP1 rs1695 polymorphism. Br J Dermatol 2012; 166:1176-83. [PMID: 22251241 DOI: 10.1111/j.1365-2133.2012.10831.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Glutathione S-transferases (GSTs) GSTM1, GSTT1 and GSTP1 are multifunctional enzymes involved in the detoxification of a wide range of reactive oxygen species produced during melanin synthesis and oxidative stress processes. OBJECTIVES Single nucleotide polymorphisms (SNPs) in GSTP1 and copy number variants in GSTM1 and GSTT1 may be candidate low-penetrance variants with a role in susceptibility to malignant melanoma (MM). METHODS In this case-control study, 562 Spanish patients with sporadic MM and 338 cancer-free control subjects were included, and the role of polymorphisms in these GST genes was investigated. Genotypes were established by quantitative real-time polymerase chain reaction for GSTM1 and GSTT1 while TaqMan probes were used to genotype GSTP1 SNPs. RESULTS The GSTP1 polymorphism rs1695, which encodes the amino acid change p.Ile105Val, was individually associated with MM [odds ratio (OR): 1·32, 95% confidence interval (CI): 1·06-1·63]. Furthermore, individuals carrying one or two MC1R nonsynonymous changes and GSTP1 rs1695 rare allele had an increased risk of developing MM (OR: 3·34, 95% CI: 1·42-8·09 and OR: 20·42, 95% CI: 2·80-417·42, respectively). CONCLUSIONS This is the first time that the GSTP1 rs1695 polymorphism is reported to be associated with MM. In addition, this study is one of the largest GST polymorphism studies undertaken in the Spanish population and the first time that copy number variants have been scrutinized in relation to MM.
Collapse
Affiliation(s)
- M Ibarrola-Villava
- Department of Haematology and Medical Oncology, Fundación Investigación Hospital Clínico Universitario-INCLIVA, 46010 Valencia, Spain
| | | | | | | | | | | |
Collapse
|
16
|
Feito-Rodríguez M, de Lucas-Laguna R, Bastian BC, Leboit P, González-Beato MJ, López-Gutiérrez JC, Requena L, Pizarro A. Nodular lesions arising in a large congenital melanocytic naevus in a newborn with eruptive disseminated Spitz naevi. Br J Dermatol 2012; 165:1138-42. [PMID: 21711345 DOI: 10.1111/j.1365-2133.2011.10502.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Congenital malignant melanoma within a pre-existing large congenital melanocytic naevus (CMN) is exceedingly rare. Its incidence is difficult to determine due to the small number of reported cases and because of problems associated with diagnosis. Some benign nodular proliferations (called proliferative nodules) arising in CMN, while rare, are significantly more common and can mimic malignant melanoma clinically or histologically. There are no reported cases of congenital melanoma or benign proliferative nodules in CMN in patients who also had eruptive disseminated Spitz naevi. We describe a girl who was noted to have a dark-brown plaque with several large erythematous nodules affecting the scalp at delivery, in addition to multiple erythematous dome-shaped papules that developed in a disseminated manner over several months, beginning at 10 days of age. It was difficult, not only clinically but also histologically, to determine the benign or malignant nature of all of these lesions. As primary cutaneous melanoma, atypical proliferative nodules in CMN, bland CMN or CMN with foci of increased cellularity and Spitz naevi show clear differences in the genetic aberration patterns, comparative genomic hybridization (CGH) could be a diagnostic help in ambiguous cases such as this. CGH performed on this patient showed multiple DNA copy number changes in the most atypical nodule, but such alterations could not be found in the remainder of the lesions. CGH showed differences between the nodular lesions that occurred in the CMN and helped us in supporting the diagnosis of this unique case of benign proliferative nodules and a possible congenital melanoma arising in a large CMN, associated with multiple widespread eruptive Spitz naevi.
Collapse
Affiliation(s)
- M Feito-Rodríguez
- Department of Dermatology, Hospital Universitario La Paz, Universidad Autónoma de Madrid, 28046 Madrid, Spain.
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Mota-Pereira J, Silverio J, Fonte D, Carvalho S, Pizarro A, Teixeira J, Ramos J, Ribeiro J. O-39 - Positive effects of exercise as an adjuvant therapy for treatment-resistant mdd only persist if the exercise is continued over time. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)74139-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
|
18
|
Mota-Pereira J, Ribeiro J, Fonte D, Carvalho S, Pizarro A, Teixeira J, Ramos J, Silverio J. P-506 - 12 Weeks of moderate intensity exercise improves treatment-resistant major depressive disorder (MDD). daily use of accelerometers contributes to 97% adherence. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)74673-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
19
|
Klahn AH, Carreño M, Godoy F, Oelckers B, Pizarro A, Toro A, Reyes A. SYNTHESES AND REACTIONS OF THE COMPLEXES (η5-C5Me5)Re(CO)2(C6CL5–nHn)Cl (n = 2,3): COMPOUNDS DERIVED FROM INITIAL C—CI ACTIVATION. J COORD CHEM 2011. [DOI: 10.1080/00958970108022650] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- A. Hugo Klahn
- a Instituto de Quimica, Universidad Catolica de Valparaiso , Casilla, 4059, Valparaiso, Chile
| | - Monica Carreño
- a Instituto de Quimica, Universidad Catolica de Valparaiso , Casilla, 4059, Valparaiso, Chile
| | - Fernando Godoy
- a Instituto de Quimica, Universidad Catolica de Valparaiso , Casilla, 4059, Valparaiso, Chile
| | - Beatriz Oelckers
- a Instituto de Quimica, Universidad Catolica de Valparaiso , Casilla, 4059, Valparaiso, Chile
| | - Alejandra Pizarro
- a Instituto de Quimica, Universidad Catolica de Valparaiso , Casilla, 4059, Valparaiso, Chile
| | - Adriana Toro
- a Instituto de Quimica, Universidad Catolica de Valparaiso , Casilla, 4059, Valparaiso, Chile
| | - Arturo Reyes
- a Instituto de Quimica, Universidad Catolica de Valparaiso , Casilla, 4059, Valparaiso, Chile
| |
Collapse
|
20
|
Ibarrola-Villava M, Peña-Chilet M, Avilés J, Feito M, Mayor M, Pizarro A, Martin-Gonzalez M, Lazaro P, Ribas G. 58 Human DNArepair genes and genetic susceptibility to melanoma: a candidate gene approach using sequenom platform. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)70867-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
21
|
Arranz-Sánchez DM, Pizarro A, Valencia-Delfa JL, Villeta-López M, González-Beato MJ, Mayor-Arenal M, Casado-Jiménez M. [Clinical-pathological features of cutaneous melanomas diagnosed in a Mediterranean tertiary hospital between 1990 and 2004: a comparison between sexes and age groups and analysis of longterm outcomes]. Actas Dermosifiliogr 2009; 100:476-85. [PMID: 19709552 DOI: 10.1016/s1578-2190(09)70104-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND The incidence of malignant melanoma has increased over recent decades. Early diagnosis continues to be essential for effective treatment. Our objective was to analyze cutaneous malignant melanomas diagnosed over a 15-year period in a tertiary hospital for trends towards earlier diagnosis and to identify subgroups with poorer prognosis. MATERIAL AND METHODS Retrospective analysis of primary cutaneous melanomas analyzed in the pathology department of Hospital La Paz, Madrid, Spain, between 1990 and 2004. RESULTS In total, 526 melanomas were diagnosed. The mean (SD) Breslow thickness was 2.63 (4.84) mm and the median thickness was 0.98 mm (range, 0-65 mm). The mean size (widest point) was 16.59 (12.11) mm. The most common histological type was surface-spreading melanoma and the most common site was the trunk. Melanomas detected in men were generally larger and thicker than in women (P=0.05). Individuals aged over 60 years consulted for significantly thicker and larger tumors than younger individuals. The incidence of malignant melanomas has increased steadily over the years whereas the mean Breslow thickness and size have decreased. CONCLUSIONS Diagnosis of melanoma in Spain is made increasingly earlier, although locally advanced tumors are still sometimes seen in men and in individuals aged over 60 years.
Collapse
Affiliation(s)
- D M Arranz-Sánchez
- Unidad de Dermatología, Hospital Infanta Sofía, San Sebastián de los Reyes, and Escuela Universitaria de Estadística, Universidad Complutense de Madrid, Madrid, Spain.
| | | | | | | | | | | | | |
Collapse
|
22
|
Domínguez JM, Baudrand R, Arteaga E, Campusano C, González G, Mosso L, Cavada G, Cruz F, Torres J, Solar A, Arias T, Pizarro A, Gómez M, Fardella C. Diseño de una escala ecográfica predictora de malignidad en nódulos tiroideos: Comunicación preliminar. Rev Med Chil 2009. [DOI: 10.4067/s0034-98872009000800005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
23
|
Domínguez JM, Baudrand R, Arteaga E, Campusano C, González G, Mosso L, Cavada G, Cruz F, Torres J, Solar A, Arias T, Pizarro A, Gómez M, Fardella C. [An ultrasound score to predict the presence of papillary thyroid carcinoma. Preliminary report]. Rev Med Chil 2009; 137:1031-1036. [PMID: 19915766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
BACKGROUND Thyroid nodules are common and associated to a low risk of malignancy. Their clinical assessment usually includes a fine needle aspiration biopsy (FNAB). AIM To identify ultrasonographic characteristics associated to papillary thyroid carcinoma (PTC) and generate a score that predicts the risk of PTC. MATERIAL AND METHODS Retrospective review of all fine needle aspiration biopsies of the thyroid performed in a lapse of two years. Biopsies that were conclusive for PTC were selected and compared with an equal amount of randomly selected biopsies that disclosed a benign diagnosis. RESULTS One hundred twenty two biopsies of a total of 1,498 were conclusive for PTC. Univariate analysis showed associations with PTC for the presence of micro-calcifications (Odds ratio (OR) 49.2: 95% confidence intervals (CI) 18.7-140.9), solid predominance (OR 25.1; 95% CI 6-220), hypoechogenicity (OR 23.5, 95% CI 6.5-122.6), irregular borders (OR 17, 95% CI 7.2-42.9), lymph node involvement (OR 12.3, 95% CI2.7-112), central vascularization (OR 12.2, 95% CI 4.8-33.3), local invasion and hyperechogenicity (OR 0.2; CI 95% CI 0.03-0.6). Multivariate analysis disclosed microcalcifications (OR 28.1; CI 95% 8.9-89), hypoechogenicity (OR 9.4; 95% CI 1.5-59.5) and irregular borders (OR 4.7; CI 95% 1.5-15) as the variables independently associated with the presence of PTC. The prevalence of PTC in the presence of the three variables was 97.6% (Likelihood ratio (LR) 45) and 5.4% in their absence (LR 0.06). CONCLUSIONS This scale predicts the presence or absence of PTC using simple ultrasound characteristics.
Collapse
Affiliation(s)
- José Miguel Domínguez
- Departamento de Endocrinología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Amaral H, Pruzzo R, Redondo F, Gil MC, Pizarro A, de la Fuente H, Butte JM, Coudeu TMI. [Detection of neuroendocrine tumors by positron emission tomography-computed tomography with 68Ga-DOTATATE: report of one case]. Rev Med Chil 2009; 137:537-541. [PMID: 19623420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report a 74-year-old male with liver metastases from a neuroendocrine tumor (NET) of unknown origin. Conventional imaging studies with ultrasound, computed tomography colonoscopy and Positron emission tomography-computed tomography (PET/CT) with 18Fluor odeoxyglucose did not identify the site of origin of the primary tumor. The patient was submitted for a PET/CT scan with a new radiopharmaceuticai, the somatostatin analogue 68Ga-DOTATATE. This new technique demonstrated increased focal uptake at the ileocecal valve. This lesion and other two liver metastases were surgically removed. The histopathology and immunohistochemistry analysis confirmed the diagnosis of NET (carcinoid). This case illustrates the advantages of the PET/CT scan with 68Ga-DOTATATE.
Collapse
|
25
|
Amaral H, Pruzzo R, Redondo F, Gil MC, Pizarro A, de la Fuente H, Butte JM, Coudeu TI. Una nueva modalidad diagnóstica para la detección de tumores neuroendocrinos con 68Ga-DOTATATE PET/CT: Caso clínico. Rev Med Chil 2009. [DOI: 10.4067/s0034-98872009000400012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
26
|
Pizarro A. [Why does sentinel lymph node biopsy not increase survival in patients with melanoma?]. Actas Dermosifiliogr 2008; 99:323-330. [PMID: 18501165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Affiliation(s)
- A Pizarro
- Unidad de Lesiones Pigmentadas y Melanoma. Instituto Madrileño de Oncología-Clínica La Milagrosa. Madrid. España.
| |
Collapse
|
27
|
Feito-Rodríguez M, González-Beato MJ, Pizarro A. [Unusual vascular pattern of a nodular lesion in the dermoscopic examination of a kidney transplant recipient]. Actas Dermosifiliogr 2008; 99:307-308. [PMID: 18394409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Affiliation(s)
- M Feito-Rodríguez
- Servicio de Dermatología, Hospital Universitario La Paz, Madrid, España.
| | | | | |
Collapse
|
28
|
|
29
|
Fernández-Suárez A, Cordero Fernández C, García Lozano R, Pizarro A, Garzón M, Núñez Roldán A. Clinical and ethical implications of genetic counselling in familial adenomatous polyposis. Rev esp enferm dig 2005; 97:654-65. [PMID: 16266238 DOI: 10.4321/s1130-01082005000900006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The association of specific genetic disturbances with the development of hereditary cancer helps us to understand the risk of suffering from it, the possibility of an earlier diagnosis, and the treatment and prevention of this disease. Familial adenomatous polyposis (FAP) is a pre-neoplastic syndrome characterized by the presence of hundreds of adenomatous polyps in the colon, which develop into a carcinoma. FAP can be diagnosed using sequencing techniques to detect mutations in the germinal line of the APC (adenomatous polyposis coli) gene. The genetic diagnostic approach in families with FAP, previously followed up in the Gastrointestinal Clinic, has both advantages and disadvantages, and places us nearer the disease and patient. Disclosing the results of this genetic test entails relevant problems in clinical practice, which affect the health field and raise legal and ethical issues, along with the familial, occupational, and social implications that knowing the genetic status can have on the patient. Genetic analysis is rare in normal clinical practice, which involves errors in the interpretation of the results obtained, and during the process of genetic counselling. Specialized multidisciplinary units are necessary for the management of patients with FAP undergoing analysis and appropriate genetic counselling, thus providing an individualized service. The creation of FAP registers and protocols for this healthcare process should optimize the management of these patients and their families.
Collapse
Affiliation(s)
- A Fernández-Suárez
- Department of Immunology, Virgen del Rocío University Hospitals, Seville, Spain
| | | | | | | | | | | |
Collapse
|
30
|
Abstract
Gene expression microarrays are a relatively new technology, dating back just a few years, yet they have already become a very widely used tool in biology, and have evolved to a wide range of applications well beyond their original design intent. However, while the use of microarrays has expanded, and the issues of performance optimization have been intensively studied, the fundamental issue of data integrity management has largely been ignored. Now that performance has improved so greatly, the shortcomings of data integrity control methods constitute a greater percent of the stumbling blocks for investigators. Microarray data are cumbersome, and the rule up to this point has mostly been one of hands-on transformations, leading to human errors which often have dramatic consequences. We show in this review that the time lost on such mistakes is enormous and dramatically affects results; therefore, mistakes should be mitigated in any way possible. We outline the scope of the data integrity issue, to survey some of the most common and dangerous data transformations, and their shortcomings. To illustrate, we review some case studies. We then look at the work done by the research community on this issue (which admittedly is meager up to this point). Some data integrity issues are always going to be difficult, while others will become easier-one of our goals is to expedite the use of integrity control methods. Finally, we present some preliminary guidelines and some specific approaches that we believe should be the focus of future research.
Collapse
Affiliation(s)
- G R Grant
- Penn Center for Bioinformatics (PCBI), University of Pennsylvania, 1429 Blockley Hall, 423 Guardian Drive, Philadelphia, Pennsylvania 19104-6021, USA.
| | | | | | | |
Collapse
|
31
|
López-Torres E, Lucena MI, Andrade RJ, García Ruiz E, Fernández MC, Peláez G, Soria de la Cruz MJ, Pizarro A. [Tetrabamate-induced hepatotoxicity. Report of seven cases and literature review]. Gastroenterol Hepatol 2002; 25:589-93. [PMID: 12459120 DOI: 10.1016/s0210-5705(02)70321-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVES Analysis of all cases of tetrabamate (Atrium)-induced hepatotoxicity reported in the Andalusian Registry of drug-induced liver disorders and comparison with cases reported in the literature. MATERIAL AND METHOD Information was gathered in a structured protocol. The causal role of tetrabamate was estimated in each case using the diagnostic scale of the Council for International Organizations of Medical Sciences (CIOMS). RESULTS Of 327 cases of hepatotoxicity, 7 (2%) were due to tetrabamate. The mean age was 57 years (4 men). In 57% of the cases, the presenting symptom was tremor. The latency period was between 15 and 730 days. Liver damage was mainly cytolytic without signs of hypersensitivity. In all cases outcome was favorable with complete recovery between 60 and 120 days. The CIOMS diagnostic scale rated a causal role of tetrabamate as highly probable in six cases and as probable in one. CONCLUSION Tetrabamate can induce hepatotoxicity, probably due to an idiosyncratic metabolic mechanism. Because of this finding and the existence of more appropriate therapeutic alternatives, tetrabamate should not be used in the treatment of alcohol withdrawal.
Collapse
Affiliation(s)
- E López-Torres
- Servicio de Farmacología Clínica. Hospital Clínico Universitario. Facultad de Medicina. Málaga. Spain
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Ruiz-Giardín JM, Noguerado A, Pizarro A, Méndez J, La Hulla F, Fernández M, Hernández F, San Martín JV, Hernández I, Alvarez J, Salvanes F. [Comparative study of prognostic and risk factors for mortality in polymicrobial bacteremia-fungemia in a university hospital: development over 10 years]. Enferm Infecc Microbiol Clin 2002; 20:435-42. [PMID: 12425877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
OBJECTIVE Eighty-two episodes of polymicrobial bacteremia in two time periods, 1986-87 and 1996-97, were compared to assess differences in risk factors and outcome to mortality. METHODS A prospective, concurrent, anterograde study with univariate analysis of all episodes of polymicrobial bacteremia was performed in Hospital de la Princesa. Logistic regression analysis was applied to all significant variables (p < 0.05) in the univariate analysis in either of the two time periods. RESULTS Variables showing statistically significant differences in incidence between the two time periods included the following: hospital acquired bacteremia; previous use of antibiotics; genitourinary, respiratory and cardiovascular manipulations; septic metastases; and absence of leukocytosis. These factors were more frequently present during 1986-87 than during 1996-97. The overall RR of outcome to mortality was five-fold greater during the first period than the second: RR 5.6 (CI 1.76-17.56) p < 0.001. The clinical characteristics at the onset of bacteremia associated with mortality in the first period were: underlying disease - < RR 2.20 (CI 1.18-4.08), steroid treatment - < RR 4.24 (CI 0.68-26.59), hypotension - < RR 2.05 (CI 1.0-4.17), and disseminated intravascular coagulation - < RR 2.31 (CI 1.69-3.35). Clinical characteristics at the onset of bacteremia associated with mortality in the second period were: hypotension - < RR 1.44 (CI 1.01-2.08), underlying disease - < RR 1.16 (CI 1.02-1.34), and disseminated intravascular coagulation - < RR 6.40 (CI 1.15-35.69). The variables independently associated with mortality in polymicrobial bacteremia were: period - < RR 2.05 (CI 1.50-2.10), underlying disease - < RR 7.05 (CI 2.68-7.50), hypotension - < RR 7.06 (CI 3.80-7.29), and (probably) vascular manipulations - < RR 3.41 (CI 0.85-4.53). CONCLUSION Polymicrobial bacteremia-associated mortality was five-fold greater in 1986-87 than in 1996-97. The variables independently associated with mortality risk were underlying disease, hypotension, the period studied (which would include a number of variables not analyzed in this work) and, probably, vascular manipulations.
Collapse
Affiliation(s)
- José Manuel Ruiz-Giardín
- Servicio de Medicina Interna-Infecciosas. Hospital Universitario de La Princesa. Madrid. España.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Manuel Ruiz-Giardín J, Noguerado A, Pizarro A, Méndez J, La Hulla F, Fernández M, Hernández F, San Martín J, Hernández I, Álvarez J, Salvanes F. Estudio comparativo de los factores de riesgo y pronósticos de mortalidad en las bacteriemias-fungemias polimicrobianas de un hospital universitario: evolución en 10 años. Enferm Infecc Microbiol Clin 2002. [DOI: 10.1016/s0213-005x(02)72839-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
34
|
Jansen BA, Pérez JM, Pizarro A, Alonso C, Reedijk J, Navarro-Ranninger C. Sterically hindered cisplatin derivatives with multiple carboxylate auxiliary arms: synthesis and reactions with guanosine-5'-monophosphate and plasmid DNA. J Inorg Biochem 2001; 85:229-35. [PMID: 11410243 DOI: 10.1016/s0162-0134(01)00183-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two novel sterically hindered cisplatin derivatives with the ligand L=NH(2)C(CH(2)CH(2)COOH)(3) were prepared: cis-PtCl(2)L(2) and cis-PtCl(2)L(NH(3)). The starting compound for the syntheses was NH(2)C(CH(2)CH(2)COOtBu)(3), also known as a building block for dendrimers. cis-PtCl(2)L(2) was prepared from K(2)PtCl(4) in an unusual two-phase reaction in water-chloroform, followed by deprotection of the tert-butyl protective groups with formic acid to yield a water-soluble complex. The mixed-ligand compound cis-PtCl(2)L(NH(3)) was prepared from [PPh(4)][PtCl(3)(NH(3))] in methanol, with subsequent deprotection in formic acid. DNA-binding properties of the two compounds were investigated using the model base guanosine-5'-monophosphate (5'-GMP) and pBR322 plasmid DNA. While cisplatin [cis-PtCl(2)(NH(3))(2)] induced an unwinding of 12 degrees in pBR322 plasmid DNA, cis-PtCl(2)L(NH(3)) induced only 3 degrees unwinding, which is indicative of a monofunctional binding mode. Remarkably, cis-PtCl(2)L(2) did not induce any distortion in plasmid DNA, which strongly suggests that the compound does not bind to DNA. Test reactions with 5'-GMP, monitored by 1H and 195Pt NMR, confirmed that cis-PtCl(2)L(2) is unable to bind to DNA, whereas cis-PtCl(2)L(NH(3)) binds only one nucleotide. Apparently, binding of platinum to nucleotides at the coordination site cis with respect to the ligand L is prevented by steric crowding. Thus, cis-PtCl(2)L(NH(3)) must bind DNA monofunctionally at the trans position. Besides, both compounds have a chloride replaced by one of the carboxylate arms, forming a a seven-membered chelate ring. In theory, cis-PtCl(2)L(2) could also form a second chelate ring, but this was not observed.
Collapse
Affiliation(s)
- B A Jansen
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, NL-2300 RA Leiden, The Netherlands
| | | | | | | | | | | |
Collapse
|
35
|
Stoeckert C, Pizarro A, Manduchi E, Gibson M, Brunk B, Crabtree J, Schug J, Shen-Orr S, Overton GC. A relational schema for both array-based and SAGE gene expression experiments. Bioinformatics 2001; 17:300-8. [PMID: 11301298 DOI: 10.1093/bioinformatics/17.4.300] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
MOTIVATION AND RESULTS A relational schema is described for capturing highly parallel gene expression experiments using different technologies. This schema grew out of efforts to build a database for collaborators working on different biological systems and using different types of platforms in their gene expression experiments as well as different types of image quantification software. The tables are conceptually organized into three categories of information: Platform, Experiment (which includes image scanning and quantification), and Data. The strengths of the schema are: (i) integrating information on array elements using a gene index; (ii) describing samples using ontologies; (iii) reducing an experiment to a single RNA source for precise descriptions yet not losing the relationships between experiments done at the same time or for the same project; and (iv) maintaining both raw and processed (e.g. cleansed and normalized) data and recording how the data is processed. The result is a novel schema, which can hold both array and non-array data, is extensible for detailed experimental descriptions that are precise and consistent, and allows for meaningful comparisons of genes between experiments.
Collapse
Affiliation(s)
- C Stoeckert
- Computational Biology and Informatics Laboratory, Center for Bioinformatics, University of Pennsylvania, 1313 Blockley Hall, 418 Guardian Drive, Philadelphia, PA 19104-6021, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Herranz P, Pizarro A, García J, González A, Casado M. [Inflammatory cutaneous nodules in an immunodepressed patient]. Enferm Infecc Microbiol Clin 2000; 18:521-3. [PMID: 11198005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Affiliation(s)
- P Herranz
- Servicio de Dermatología, Hospital Universitario La Paz, Madrid.
| | | | | | | | | |
Collapse
|
37
|
|
38
|
|
39
|
|
40
|
Serra I, García V, Pizarro A, Luzoro A, Cavada G, López J. [A universal method to correct underreporting of communicable diseases. Real incidence of hydatidosis in Chile, 1985-1994]. Rev Med Chil 1999; 127:485-92. [PMID: 10451617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
BACKGROUND There is evidence to postulate that undernotification is the reason for the great decrease in the reported incidence of hydatidosis in Chile. AIM To develop and propose a method to assess the notification of transmissible diseases, based on observed lethality and hospital discharges. MATERIAL AND METHODS Human hydatidosis in the period 1985-1994 was used as a model to develop the method. Official reports and mortality were analyzed first, determining the first lethality rate. A second lethality rate was calculated based on hospital discharges and a third, based on all Chilean surgical series published in the last two decades. Adjusting official notification of lethality to the true lethality according to surgical series, the number of unreported cases was calculated and the true incidence of hydatidosis was calculated, summing these cases to the official notification. RESULTS According to this method, the real rates of human hydatidosis in the period 1985-1994, would fluctuate between 6.5 and 11.4 per 100,000. This figure is four times higher than the official notification in the analysed period. CONCLUSIONS The correction of under notification based on hospital discharges, with or without correction for repeated hospital admissions, or real mortality of surgical series gave similar results, suggesting that both methods are correct.
Collapse
Affiliation(s)
- I Serra
- Escuela de Salud Pública, Facultad de Medicina, Universidad de Chile
| | | | | | | | | | | |
Collapse
|
41
|
|
42
|
Rubio FA, Robayna G, Pizarro A, de Lucas R, Herranz P, Casado M. Actinic granuloma and vitiligo treated with pentoxifylline. Int J Dermatol 1998; 37:958-60. [PMID: 9888345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
|
43
|
Herranz P, Pizarro A, De Lucas R, Arribas JR, García-Tobaruela A, Peña JM, Casado M. Treatment of AIDS-associated prurigo nodularis with thalidomide. Clin Exp Dermatol 1998; 23:233-5. [PMID: 10233821 DOI: 10.1046/j.1365-2230.1998.00314.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
44
|
Dosoretz DE, Rubenstein JH, Katin MJ, Blitzer PH, Reisinger SA, Garton GR, Salenius SA, Harwin WH, Teufel TE, Raymond MG, Reeves JA, Rubin MS, Hart LL, McCleod MJ, Pizarro A, Gabarda AL. Small-cell lung carcinoma: an analysis of 194 consecutive patients. Am J Clin Oncol 1998; 21:333-7. [PMID: 9708628 DOI: 10.1097/00000421-199808000-00003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The treatment of small-cell lung carcinoma (SCLC) requires the careful combination of chemotherapy and radiation therapy. To understand the factors involved in the outcome of these patients, the authors undertook a study of patients treated for limited stage SCLC. The charts of 194 consecutive patients treated at our facilities between 1986 and 1994 were reviewed. All patients underwent thoracic radiation therapy (TRT), 50% received prophylactic cranial irradiation (PCI), and all but one received chemotherapy. The probability of survival at 5 years was 14%, and the disease-free survival (DFS) was 17%. Patients receiving a combination of platinum and etoposide (PE) and Cytoxan (Bristol-Myers, Evansville, IN, U.S.A.), Adriamycin (Adria Laboratories, Dublin, OH, U.S.A.), and Vincristine (Eli Lilly, Indianapolis, IN, U.S.A.) (CAV) experienced a DFS at 3 years of 31%, versus 14% for CAV only and 18% for PE only (p = 0.004). In a multivariate survival analysis, only PCI (p = 0.001), having received PE and CAV (p = 0.01), and response to treatment (p = 0.001) were significant. Radiation dose and field size did not influence outcome. The combination of PE and CAV chemotherapy produced the best results in our series. Unanswered questions regarding the optimal TRT dose, field size, and timing of TRT await the results of ongoing randomized trials.
Collapse
Affiliation(s)
- D E Dosoretz
- Radiation Therapy Regional Center, Fort Meyers, FL 33908, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Navarro J, Punzón C, Jiménez JL, Fernández-Cruz E, Pizarro A, Fresno M, Muñoz-Fernández MA. Inhibition of phosphodiesterase type IV suppresses human immunodeficiency virus type 1 replication and cytokine production in primary T cells: involvement of NF-kappaB and NFAT. J Virol 1998; 72:4712-20. [PMID: 9573235 PMCID: PMC109998 DOI: 10.1128/jvi.72.6.4712-4720.1998] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/1997] [Accepted: 02/20/1998] [Indexed: 02/07/2023] Open
Abstract
Rolipram, a phosphosdiesterase type IV-specific inhibitor, prevented p24 antigen release from anti-CD3-activated human immunodeficiency virus (HIV)-infected T cells and CD4(+)-cell depletion associated with viral replication in a dose-responsive manner but minimally inhibited T-cell proliferation. Moreover, rolipram reduced the production of tumor necrosis factor alpha (TNF-alpha) and interleukin-10 (IL-10) by HIV-infected T cells. The transcriptional ability of a luciferase reporter gene under control of the HIV long terminal repeat, induced by phorbol myristic acetate plus ionomycin or by TNF-alpha, in primary T and Jurkat cells was also inhibited by rolipram. Rolipram inhibited NF-kappaB and NFAT activation induced by T-cell activation in Jurkat and primary T cells, as measured by transient transfection of reporter genes and electrophoretic mobility shift assays. Exogenous addition of TNF-alpha in the presence of rolipram restored NF-kappaB but not NFAT activation or p24 release. Addition of dibutyryl-cyclic AMP (dBcAMP) mimicked the effects of rolipram on p24 antigen release, NF-kappaB activation, and TNF-alpha secretion, but it did not affect NFAT activation or IL-10 production. The protein kinase A inhibitor KT5720 prevented the inhibition of TNF-alpha secretion but not that of HIV type 1 (HIV-1) replication caused by rolipram. Our data indicate that blockade of phosphodiesterase type IV could be of benefit against HIV-1 disease by modulating cytokine secretion and transcriptional regulation of HIV replication, and they suggest an important role of NFAT in HIV replication in primary T cells. Some of those activities cannot be ascribed solely to its ability to increase cAMP.
Collapse
Affiliation(s)
- J Navarro
- Department of Immunology, Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | | | | | | | | | | | | |
Collapse
|
46
|
Pizarro A, García-Tobaruela A, Pinilla J. Bronchiolitis obliterans, Castleman's disease, and a bullous disease: pemphigus vulgaris or paraneoplastic pemphigus? Hum Pathol 1998; 29:657-8. [PMID: 9635692 DOI: 10.1016/s0046-8177(98)80024-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
47
|
Staczek J, Marino AA, Gilleland LB, Pizarro A, Gilleland HE. Low-frequency electromagnetic fields alter the replication cycle of MS2 bacteriophage. Curr Microbiol 1998; 36:298-301. [PMID: 9541567 DOI: 10.1007/s002849900313] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The effect of exposure to 60-Hz electromagnetic fields (EMFs) on RNA coliphage MS2 replication was studied. EMF exposure commenced when the bacterial cultures were inoculated with the phage (t = 0). In 12 experiments in which the strength of the field was 5 G, a significant delay in phage yield was found in the EMF-exposed cultures 45-65 min after inoculation, compared with control cultures. However, the EMF did not alter the final phage concentration. Experiments at 25 G (N = 5) suggested that the stronger field resulted in both impeded phage replication and increased phage yield. No differences between test groups were found in experiments involving sham-EMF exposure, thereby indicating that the results obtained with the EMFs were not due to systematic error. It appears that MS2, which codes for only four proteins, is the simplest biological system in which an EMF-induced effect has been demonstrated. The MS2 system is, therefore, conducive to follow-up studies aimed at understanding the level and nature of the underlying interaction process, and perhaps to biophysical modeling of the interaction process.
Collapse
Affiliation(s)
- J Staczek
- Department of Microbiology & Immunology, Louisiana State University Medical Center, 1501 Kings Hwy., Shreveport, LA 71130-3932, USA
| | | | | | | | | |
Collapse
|
48
|
Pizarro A, García-Tobaruela A, Gil A, Muñoz-Fernández MA. [Plasma cell tumors associated with HIV infection]. Med Clin (Barc) 1998; 110:78-9. [PMID: 9580163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
49
|
Hernández-Cano N, Pizarro A, Lázaro TE, Mayor M, Burón I, Contreras F, Casado M. Nonscarring alopecia associated with solitary circumscribed neuroma. Dermatology 1998; 195:265-7. [PMID: 9407176 DOI: 10.1159/000245957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
We report an unusual case of nonscarring alopecia clinically resembling patchy alopecia areata around central solitary circumscribed neuroma. Prompt and spontaneous complete hair regrowth was observed after removal of the tumor. Further knowledge of growth factor and receptor interaction in regulating the hair follicle cycle, as well as on the production of growth factors and cytokines by tumor cells and/or cells within the tumor microenvironment may contribute to better understand the pathologic mechanisms underlying certain curious phenomena such as peritumoral nonscarring alopecia.
Collapse
Affiliation(s)
- N Hernández-Cano
- Department of Dermatology, La Paz University Hospital, Autonomous University of Madrid, Spain
| | | | | | | | | | | | | |
Collapse
|
50
|
Lázaro TE, Hernández-Cano N, Rubio FA, Robayna G, Contreras F, Pizarro A, Casado M. Cutaneous calcinosis with transepithelial elimination in a patient with sarcoidosis. Int J Dermatol 1998; 37:41-3. [PMID: 9522238 DOI: 10.1046/j.1365-4362.1998.00319.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- T E Lázaro
- Department of Dermatology, La Paz University Hospital, Autonomous University of Madrid, Spain
| | | | | | | | | | | | | |
Collapse
|